During an interview with Give Me My Remote at Friday night’s TCA party, John Noble has released some spoilers about the Fringe Season 4.

When asked if the dynamics will be a slight change since Peter no longer exists, he specifies: “I don’t think the truth of it is that Peter doesn’t exist. I think it’s that he didn’t survive* There’s a big difference.”*The illness that killed Walter's biological son

He also explained that he has not shared any scenes with Jackson but the Peter's "presence has been felt, but we’re building up over the first block of [episodes] — we sort of do things in blocks — the first four really build up to his proper arrival. He’s been seen before that, but it’s quite interesting the way shape things.”

Adding, with a smile, that he can’t wait for him to get back: “We have a lot of fun together. But it’s not long to wait now.”